1374986021 has 2 divisors, whose sum is σ = 1374986022. Its totient is φ = 1374986020.

The previous prime is 1374985999. The next prime is 1374986029. The reversal of 1374986021 is 1206894731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 807355396 + 567630625 = 28414^2 + 23825^2 .

It is a cyclic number.

It is not a de Polignac number, because 1374986021 - 2⁶ = 1374985957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1374986021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1374986029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 687493010 + 687493011.

It is an arithmetic number, because the mean of its divisors is an integer number (687493011).

Almost surely, 2^1374986021 is an apocalyptic number.

It is an amenable number.

1374986021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1374986021 is an equidigital number, since it uses as much as digits as its factorization.

1374986021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 1374986021 is about 37080.8039422017. The cubic root of 1374986021 is about 1111.9862769061.

The spelling of 1374986021 in words is "one billion, three hundred seventy-four million, nine hundred eighty-six thousand, twenty-one".